test: do not strip left whitespace in pseudo-tty tests

PR-URL: #27244
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Beth Griggs <Bethany.Griggs@uk.ibm.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>

test/pseudo-tty/console_colors.out

@@ -3,9 +3,9 @@ string q
 { foo: *[32m'bar'*[39m } with object format param
 
 Error: test
-at abc (../fixtures/node_modules/bar.js:4:4)
+    at abc (../fixtures/node_modules/bar.js:4:4)
 foobar
-at * (*console_colors.js:*:*)
+    at * (*console_colors.js:*:*)
 *[90m    at * (internal*:*:*)*[39m
 *[90m    at *[39m
 *[90m    at *[39m
@@ -14,22 +14,22 @@ at * (*console_colors.js:*:*)
 *[90m    at *[39m
 
 Error: Should not ever get here.
-at * (*node_modules*[4m*node_modules*[24m*bar.js:*:*)
+    at * (*node_modules*[4m*node_modules*[24m*bar.js:*:*)
 *[90m    at *[39m
 *[90m    at *[39m
 *[90m    at *[39m
 *[90m    at *[39m
 *[90m    at *[39m
 *[90m    at *[39m
-at * (*console_colors.js:*:*)
+    at * (*console_colors.js:*:*)
 *[90m    at *[39m
 *[90m    at *[39m
 
 Error
-at evalmachine.<anonymous>:*:*
+    at evalmachine.<anonymous>:*:*
 *[90m    at Script.runInThisContext (vm.js:*:*)*[39m
 *[90m    at Object.runInThisContext (vm.js:*:*)*[39m
-at * (*console_colors.js:*:*)
+    at * (*console_colors.js:*:*)
 *[90m    at *[39m
 *[90m    at *[39m
 *[90m    at *[39m

test/pseudo-tty/testcfg.py

@@ -66,7 +66,7 @@ def IsFailureOutput(self, output):
       patterns.append(pattern)
     # Compare actual output with the expected
     raw_lines = (output.stdout + output.stderr).split('\n')
-    outlines = [ s.strip() for s in raw_lines if not self.IgnoreLine(s) ]
+    outlines = [ s.rstrip() for s in raw_lines if not self.IgnoreLine(s) ]
     if len(outlines) != len(patterns):
       print("length differs.")
       print("expect=%d" % len(patterns))