toosl: fix v init - terminate newly created files with newlines, add a test (#10480)

* vcreate: Add test for `v init`.

* vcreate: Init git properly with no dir arg.

`v init` would fail to create a .gitignore file. When not providing a
dir arg, passing "" to create_git_repo would result in:

```
V panic: failed to create gitignore: failed to open file "/.gitignore"
```

* vcreate: Terminate files with newline.

Fixes #10478.

cmd/tools/vcreate.v

@@ -50,6 +50,7 @@ fn vmod_content(c Create) string {
 		"	license: '$c.license'",
 		'	dependencies: []',
 		'}',
+		'',
 	].join('\n')
 }
 
@@ -59,6 +60,7 @@ fn main_content() string {
 		'fn main() {',
 		"	println('Hello World!')",
 		'}',
+		'',
 	].join('\n')
 }
 
@@ -72,6 +74,7 @@ fn gen_gitignore(name string) string {
 		'*.so',
 		'*.dylib',
 		'*.dll',
+		'',
 	].join('\n')
 }
 
@@ -160,7 +163,7 @@ fn init_project() {
 	c.description = ''
 	c.write_vmod(false)
 	c.write_main(false)
-	c.create_git_repo('')
+	c.create_git_repo('.')
 
 	println("Change your module's description in `v.mod`")
 }

cmd/tools/vcreate_test.v

@@ -0,0 +1,47 @@
+import os
+
+const test_path = 'vcreate_test'
+
+fn test_v_init() ? {
+	dir := os.join_path(os.temp_dir(), test_path)
+	os.rmdir_all(dir) or {}
+	os.mkdir(dir) ?
+	defer {
+		os.rmdir_all(dir) or {}
+	}
+	os.chdir(dir)
+
+	vexe := os.getenv('VEXE')
+	os.execute_or_panic('$vexe init')
+
+	assert os.read_file('vcreate_test.v') ? == [
+		'module main\n',
+		'fn main() {',
+		"	println('Hello World!')",
+		'}',
+		'',
+	].join('\n')
+
+	assert os.read_file('v.mod') ? == [
+		'Module {',
+		"	name: 'vcreate_test'",
+		"	description: ''",
+		"	version: ''",
+		"	license: ''",
+		'	dependencies: []',
+		'}',
+		'',
+	].join('\n')
+
+	assert os.read_file('.gitignore') ? == [
+		'# Binaries for programs and plugins',
+		'main',
+		'vcreate_test',
+		'*.exe',
+		'*.exe~',
+		'*.so',
+		'*.dylib',
+		'*.dll',
+		'',
+	].join('\n')
+}