Improved scanner test coverage

src/scanner/testdata/errors/ExpectedFunctionDefinition.q

@@ -1 +1 @@
-main()
+f()

src/scanner/testdata/errors/ExpectedFunctionDefinition2.q

@@ -0,0 +1 @@
+f() 123

src/scanner/testdata/errors/InvalidCharacter2.q

@@ -1 +1 @@
-main@
+f@

src/scanner/testdata/errors/InvalidCharacter4.q

@@ -1,4 +1,4 @@
-main() {
+f() {
 	x := 123 +++ 456
 	syscall(60, x)
 }

src/scanner/testdata/errors/InvalidCondition.q

@@ -1,3 +1,3 @@
-main() {
+f() {
 	if 42 {}
 }

src/scanner/testdata/errors/InvalidExpression.q

@@ -1,3 +1,3 @@
-main() {
+f() {
 	syscall(+, -, *, /)
 }

src/scanner/testdata/errors/InvalidFunctionDefinition.q

@@ -1 +1 @@
-main
+f

src/scanner/testdata/errors/InvalidFunctionDefinition2.q

@@ -0,0 +1 @@
+f 123

src/scanner/testdata/errors/MissingBlockEnd.q

@@ -1 +1 @@
-main(){
+f(){

src/scanner/testdata/errors/MissingBlockEnd2.q

@@ -1,3 +1,3 @@
-main() {
+f() {
 	loop {
 }

src/scanner/testdata/errors/MissingBlockStart.q

@@ -1 +1 @@
-main()}
+f()}

src/scanner/testdata/errors/MissingGroupEnd.q

@@ -1 +1 @@
-main(
+f(

src/scanner/testdata/errors/MissingGroupEnd2.q

@@ -0,0 +1 @@
+f() -> (

src/scanner/testdata/errors/MissingGroupStart.q

@@ -1 +1 @@
-main)
+f)

src/scanner/testdata/errors/MissingParameter.q

@@ -1 +1 @@
-f(,) {}
+f(a (int)->(int),) {}