remove duplicate "Error" in onoe/odie arguments

Library/Homebrew/brew.sh

@@ -92,7 +92,7 @@ odie() {
 }
 
 safe_cd() {
-  cd "$@" >/dev/null || odie "Error: failed to cd to $*!"
+  cd "$@" >/dev/null || odie "Failed to cd to $*!"
 }
 
 brew() {

Library/Homebrew/migrator.rb

@@ -220,7 +220,7 @@ class Migrator
   rescue Interrupt
     ignore_interrupts { backup_oldname }
   rescue Exception => e # rubocop:disable Lint/RescueException
-    onoe "Error occurred while migrating."
+    onoe "The migration did not complete successfully."
     puts e
     puts e.backtrace if debug?
     puts "Backing up..."
@@ -314,14 +314,14 @@ class Migrator
     begin
       new_keg.link(overwrite: true, verbose: verbose?)
     rescue Keg::ConflictError => e
-      onoe "Error while executing `brew link` step on #{newname}"
+      onoe "The `brew link` step did not complete successfully."
       puts e
       puts
       puts "Possible conflicting files are:"
       new_keg.link(dry_run: true, overwrite: true, verbose: verbose?)
       raise
     rescue Keg::LinkError => e
-      onoe "Error while linking"
+      onoe "The `brew link` step did not complete successfully."
       puts e
       puts
       puts "You can try again using:"