Revert "Fix 'Deprecated usage of '|' at the beginning of unquoted str…

…ing' warning"

This reverts commit ce634f3.

IDE likes this commit but `sh` does not:

'/bin/sh: 2: Syntax error: "|" unexpected'

.tugboat/config.yml

@@ -12,10 +12,10 @@ services:
     commands:
       init:
         - printf "\nInclude $TUGBOAT_ROOT/.tugboat/proxy-httpd.conf\n" >> /usr/local/apache2/conf/httpd.conf
-      build: |
-        echo "$TUGBOAT_PREVIEW_NAME"
-          | awk -f .tugboat/qa-subdomain.awk
-          > $TUGBOAT_ROOT/qa_subdomain.conf
+      build:
+        - echo "$TUGBOAT_PREVIEW_NAME"
+            | awk -f .tugboat/qa-subdomain.awk
+            > $TUGBOAT_ROOT/qa_subdomain.conf
   # What to call the service hosting the site.
   php:
     # Use PHP 7.x with Apache; this syntax pulls in the latest version of PHP 7