Corrected typo. Updated comment.

.travis.yml

@@ -33,8 +33,8 @@ addons:
     - qemu-system-x86
   homebrew:
     packages:
-    # for all EPICS builds
-    - bash
+    # for the sequencer
+    - re2c
     update: true
 
 install:
@@ -45,7 +45,25 @@ script:
   - python .ci/cue.py test
   - python .ci/cue.py test-results
 
-# Build using default gcc for Base branches 7.0 and 3.15
+# If you need to do more during install and build,
+# add a local directory to your module and do e.g.
+#  - ./.ci-local/travis/install-extras.sh
+
+# Define build jobs
+
+# Well-known variables to use
+# SET      source setup file
+# EXTRA    content will be added to make command line
+# STATIC   set to YES for static build (default: NO)
+# TEST     set to NO to skip running the tests (default: YES)
+# VV       set to make build scripts verbose (default: unset)
+
+# Usually from setup files, but may be specified or overridden
+#  on a job line
+# MODULES  list of dependency modules
+# BASE     branch or release tag name of the EPICS Base to use
+# <MODULE> branch or release tag for a specific module
+# ...      see README for setup file syntax description
 
 jobs:
   include: