all: fix typos (#19634)

cmd/tools/test_os_process.v

@@ -59,7 +59,7 @@ fn main() {
 		Prints lines periodically (-period_ms), to stdout/stderr (-target).
 		After a while (-timeout_ms), exit with (-exitcode).
 		This program is useful for platform independent testing
-		of child process/standart input/output control.
+		of child process/standard input/output control.
 		It is used in V's `os` module tests.
 ")
 		return

cmd/tools/vdoc/tests/testdata/newlines/main.comments.out

@@ -15,7 +15,7 @@ fn funky()
     - bar
     # test
     ########### deep test
-    #a shouldnt have a newline test
+    #a shouldn't have a newline test
     
     | foo bar   |  yes   |
     |-----------|--------|

cmd/tools/vdoc/tests/testdata/newlines/main.v

@@ -12,7 +12,7 @@
 // - bar
 // # test
 // ########### deep test
-// #a shouldnt have a newline
+// #a shouldn't have a newline
 // test
 //
 // | foo bar   |  yes   |