fmt: remove trailing space in comments (#9620)

vlib/builtin/builtin_d_gcboehm.v

@@ -29,7 +29,7 @@ fn C.GC_REALLOC(ptr voidptr, n size_t) voidptr
 fn C.GC_FREE(ptr voidptr)
 
 // explicitely perform garbage collection now! Garbage collections
-// are done automatically when needed, so this function is hardly needed 
+// are done automatically when needed, so this function is hardly needed
 fn C.GC_gcollect()
 
 // functions to temporarily suspend/resume garbage collection

vlib/dl/dl_nix.c.v

@@ -31,7 +31,7 @@ pub fn sym(handle voidptr, symbol string) voidptr {
 }
 
 // dlerror provides a text error diagnostic message for functions in `dl`
-// it returns a human-readable string, describing the most recent error 
+// it returns a human-readable string, describing the most recent error
 // that occurred from a call to one of the `dl` functions, since the last
 // call to dlerror()
 pub fn dlerror() string {

vlib/dl/dl_windows.c.v

@@ -28,7 +28,7 @@ pub fn sym(handle voidptr, symbol string) voidptr {
 }
 
 // dlerror provides a text error diagnostic message for functions in `dl`
-// it returns a human-readable string, describing the most recent error 
+// it returns a human-readable string, describing the most recent error
 // that occurred from a call to one of the `dl` functions, since the last
 // call to dlerror()
 pub fn dlerror() string {

vlib/os/process_test.v

@@ -11,7 +11,7 @@ const (
 fn testsuite_begin() ? {
 	os.rm(test_os_process) or {}
 	if os.getenv('WINE_TEST_OS_PROCESS_EXE') != '' {
-		// Make it easier to run the test under wine emulation, by just 
+		// Make it easier to run the test under wine emulation, by just
 		// prebuilding the executable with:
 		//   v -os windows -o x.exe cmd/tools/test_os_process.v
 		//   WINE_TEST_OS_PROCESS_EXE=x.exe ./v -os windows vlib/os/process_test.v

vlib/v/fmt/comments.v

@@ -44,7 +44,7 @@ pub fn (mut f Fmt) comment(node ast.Comment, options CommentsOptions) {
 		}
 	} else if !node.text.contains('\n') {
 		is_separate_line := !options.inline || node.text.starts_with('\x01')
-		mut s := node.text.trim_left('\x01')
+		mut s := node.text.trim_left('\x01').trim_right(' ')
 		mut out_s := '//'
 		if s != '' {
 			if is_char_alphanumeric(s[0]) {
@@ -67,7 +67,7 @@ pub fn (mut f Fmt) comment(node ast.Comment, options CommentsOptions) {
 			f.writeln('')
 		}
 		for line in lines {
-			f.writeln(line)
+			f.writeln(line.trim_right(' '))
 			f.empty_line = false
 		}
 		if end_break {

vlib/v/fmt/tests/trailing_space_expected.vv

@@ -0,0 +1,10 @@
+// NB: The input file has and *should* have trailing spaces.
+// When making changes, please ensure these spaces are not removed.
+
+fn comments_with_trailing_space() {
+	// two spaces on the right
+	/*
+	spaces after here
+	and everywhere :)
+	*/
+}

vlib/v/fmt/tests/trailing_space_input.vv

@@ -0,0 +1,10 @@
+// NB: The input file has and *should* have trailing spaces.
+// When making changes, please ensure these spaces are not removed.
+
+fn comments_with_trailing_space() {
+	// two spaces on the right  
+	/*  
+	spaces after here  
+	and everywhere :)  
+	*/  
+}

vlib/v/pref/default.v

@@ -61,15 +61,15 @@ pub fn (mut p Preferences) fill_with_defaults() {
 		// locate resources relative to it. That enables running examples like
 		// this:
 		// `./v run examples/flappylearning/`
-		// instead of: 
+		// instead of:
 		// `./v -o examples/flappylearning/flappylearning run examples/flappylearning/`
 		// This topic comes up periodically from time to time on Discord, and
 		// many CI breakages already happened, when someone decides to make V
 		// behave in this aspect similarly to the dumb behaviour of other
 		// compilers.
 		//
-		// If you do decide to break it, please *at the very least*, test it 
+		// If you do decide to break it, please *at the very least*, test it
-		// extensively, and make a PR about it, instead of commiting directly 
+		// extensively, and make a PR about it, instead of commiting directly
 		// and breaking the CI, VC, and users doing `v up`.
 		if rpath == '$p.vroot/cmd/v' && os.is_dir('vlib/compiler') {
 			// Building V? Use v2, since we can't overwrite a running

vlib/v/tests/assembly/asm_test.amd64.v

@@ -24,7 +24,7 @@ fn test_inline_asm() {
 		mov f, d
 		add f, e
 		add f, 5
-		; +r (f) // output 
+		; +r (f) // output
 		; r (d)
 		  r (e) // input
 	}
@@ -45,7 +45,7 @@ fn test_inline_asm() {
 
 	mut j := 0
 	// do 5*3
-	// adding three, five times 
+	// adding three, five times
 	asm amd64 {
 		mov rcx, 5 // loop 5 times
 		loop_start:

vlib/v/tests/assembly/asm_test.i386.v

@@ -25,7 +25,7 @@ fn test_inline_asm() {
 		mov f, d
 		add f, e
 		add f, 5
-		; +r (f) // output 
+		; +r (f) // output
 		; r (d)
 		  r (e) // input
 	}

vlib/v/tests/match_expression_with_fn_names_in_branches_test.v

@@ -32,7 +32,7 @@ fn sine(note &Note, time f32, amp f32) f32 {
 pub fn new_context(cfg Config) fn (&Note, f32, f32) f32 {
 	// Note, that here `sine` and `sawtooth`,
 	// are different functions, but they do have
-	// a compatible signature, so `next_fn` can 
+	// a compatible signature, so `next_fn` can
 	// become either one of them:
 	next_fn := match cfg.wave_kind {
 		.sine { sine }

vlib/v/tests/mut_receiver_returned_as_reference_test.v

@@ -10,7 +10,7 @@ fn (mut p Player) set_name(name string) &Player {
 	return p // because of automatic (de)reference of return values
 }
 
-// NB: `p` is declared as a `mut` parameter, 
+// NB: `p` is declared as a `mut` parameter,
 // which now only affects its mutability.
 fn (mut p Player) set_position(x int, y int) &Player {
 	p.x = x

vlib/v/tests/project_with_modules_having_submodules/bin/a_program_under_bin_can_find_mod1_test.v

@@ -6,7 +6,7 @@ fn test_mod1_can_still_be_found_through_parent_project_vmod() {
 
 /*
 NB: this main program is under bin/ , but it still
-can find mod1, because the parent project has v.mod, 
+can find mod1, because the parent project has v.mod,
 so v module lookup for this program will find mod1 through
 relation to the parent v.mod file
 */

vlib/v/tests/project_with_modules_having_submodules/bin/main.vsh

@@ -7,8 +7,8 @@ println('This script is located inside: ' + resource_abs_path(''))
 println('The result of calling m.f is: ' + m.f().str())
 
 /*
-NB: this main program v script is under bin/ , 
+NB: this main program v script is under bin/ ,
-but it *still* can find mod1, because the parent project has v.mod, 
+but it *still* can find mod1, because the parent project has v.mod,
-so v module lookup for this bin/main.vsh file will find mod1 through 
+so v module lookup for this bin/main.vsh file will find mod1 through
 relation to the parent ../v.mod file
 */

vlib/v/tests/project_with_modules_having_submodules/mod1/submodule/m.v

@@ -2,7 +2,7 @@ module submodule
 
 /*
 This submodule just imports its sibling submodules.
-Note that they are NOT under 'submodule' itself, 
+Note that they are NOT under 'submodule' itself,
 but are in its parent mod1 , and mod1 has a 'v.mod' file.
 */
 import v.tests.project_with_modules_having_submodules.mod1.mod11

vlib/v/tests/sum_type_test.v

@@ -572,7 +572,7 @@ fn handle(e Expr) string {
 
 // Binary Search Tree test by @SleepyRoy
 // TODO: make Node.value generic once it's robust enough
-// TODO: `return match` instead of returns everywhere inside match 
+// TODO: `return match` instead of returns everywhere inside match
 
 struct Empty {}