Normalize test results for different test environments

Author: jsgf

src/test/ui/commandline-argfile-badutf8.rs

@@ -1,6 +1,7 @@
 // Check to see if we can get parameters from an @argsfile file
 //
 // build-fail
+// normalize-stderr-test: "Argument \d+" -> "Argument $$N"
 // compile-flags: --cfg cmdline_set @{{src-base}}/commandline-argfile-badutf8.args
 
 #[cfg(not(cmdline_set))]

src/test/ui/commandline-argfile-badutf8.stderr

@@ -1,2 +1,2 @@
-error: Argument 18 is not valid: Utf8 error in $DIR/commandline-argfile-badutf8.args
+error: Argument $N is not valid: Utf8 error in $DIR/commandline-argfile-badutf8.args
 

src/test/ui/commandline-argfile-missing.rs

@@ -1,6 +1,8 @@
 // Check to see if we can get parameters from an @argsfile file
 //
 // build-fail
+// normalize-stderr-test: "Argument \d+" -> "Argument $$N"
+// normalize-stderr-test: "os error \d+" -> "os error $$ERR"
 // compile-flags: --cfg cmdline_set @{{src-base}}/commandline-argfile-missing.args
 
 #[cfg(not(cmdline_set))]

src/test/ui/commandline-argfile-missing.stderr

@@ -1,2 +1,2 @@
-error: Argument 18 is not valid: IO Error: $DIR/commandline-argfile-missing.args: No such file or directory (os error 2)
+error: Argument $N is not valid: IO Error: $DIR/commandline-argfile-missing.args: No such file or directory (os error $ERR)