Stoppp using trippple consonants

pkg/front_end/messages.yaml

Index: pkg/front_end/messages.yaml
diff --git a/pkg/front_end/messages.yaml b/pkg/front_end/messages.yaml
index fa905fbc06832485712d82057f39fec4f1689075..9157226de4005125c24c8238c5fa0839a829e657 100644
--- a/pkg/front_end/messages.yaml
+++ b/pkg/front_end/messages.yaml
@@ -35,20 +35,20 @@
 AsciiControlCharacter:
   template: "The control character #unicode can only be used in strings and comments."
   dart2jsCode: BAD_INPUT_CHARACTER
-  expresssion: "\x1b 1"
+  expression: "\x1b 1"
 
 NonAsciiIdentifier:
   template: "The non-ASCII character '#character' (#unicode) can't be used in identifiers, only in strings and comments."
   tip: "Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign)."
   analyzerCode: ILLEGAL_CHARACTER
   dart2jsCode: BAD_INPUT_CHARACTER
-  expresssion: "å"
+  expression: "å"
 
 NonAsciiWhitespace:
   template: "The non-ASCII space character #unicode can only be used in strings and comments."
   analyzerCode: ILLEGAL_CHARACTER
   dart2jsCode: BAD_INPUT_CHARACTER
-  expresssion: "\u2028 1"
+  expression: "\u2028 1"
 
 Encoding:
   template: "Unable to decode bytes as UTF-8."