fmt: do not prepend mod to selectively imported types from nested module (#8805)

vlib/v/fmt/fmt.v

@@ -80,9 +80,11 @@ pub fn fmt(file ast.File, table &table.Table, pref &pref.Preferences, is_debug b
 
 pub fn (mut f Fmt) process_file_imports(file &ast.File) {
 	for imp in file.imports {
-		f.mod2alias[imp.mod.all_after_last('.')] = imp.alias
+		mod := imp.mod.all_after_last('.')
+		f.mod2alias[mod] = imp.alias
 		for sym in imp.syms {
 			f.mod2alias['${imp.mod}.$sym.name'] = sym.name
+			f.mod2alias['${mod}.$sym.name'] = sym.name
 			f.mod2alias[sym.name] = sym.name
 			f.import_syms_used[sym.name] = false
 		}

vlib/v/fmt/tests/import_selective_expected.vv

@@ -1,12 +1,18 @@
 import math { max, min }
+import math.complex { complex, Complex }
 import os {
 	user_os,
 	file_ext,
 }
 
+fn imaginary(im f64) Complex {
+	return complex(0, im)
+}
+
 fn main() {
 	println(max(0.1, 0.2))
 	println(min(0.1, 0.2))
 	println(user_os())
 	println(file_ext('main.v'))
+	println(imaginary(1))
 }

vlib/v/fmt/tests/import_selective_input.vv

@@ -1,12 +1,18 @@
 import math { max,
 	min,
 }
+import math.complex { complex, Complex }
 import os {
 	input, user_os, file_ext }
 
+fn imaginary(im f64) Complex {
+	return complex(0, im)
+}
+
 fn main() {
 	println(max(0.1, 0.2))
 	println(min(0.1, 0.2))
 	println(user_os())
 	println(file_ext('main.v'))
+	println(imaginary(1))
 }