[gnome-builder] CI: Improve formatting of yaml strings

[Jordan Petridis <jpetridis src gnome org>]

commit 7dc767fe329bf97f67095b737b2a45ee7febca1b
Author: Jordan Petridis <jpetridis gnome org>
Date:   Wed Oct 10 09:53:25 2018 +0300

    CI: Improve formatting of yaml strings

 .gitlab-ci.yml | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 5e453da73..11c9eb08c 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -16,10 +16,18 @@ flatpak:
         RUNTIME_REPO: "https://sdk.gnome.org/gnome-nightly.flatpakrepo";
         # Replace with your application name, as written in the manifest
         FLATPAK_MODULE: "gnome-builder"
+        DBUS_ID: "org.gnome.Builder"
         # Make sure to keep this in sync with the Flatpak manifest, all arguments
         # are passed except the config-args because we build it ourselves
-        MESON_ARGS: "--buildtype=debugoptimized -Dctags_path=/app/bin/ctags -Dfusermount_wrapper=true 
-Dwith_tcmalloc=true -Denable_tracing=true -Dwith_help=true -Dwith_channel=flatpak-nightly 
-Dwith_deviced=true"
-        DBUS_ID: "org.gnome.Builder"
+        MESON_ARGS: |
+          --buildtype=debugoptimized
+          -Dctags_path=/app/bin/ctags
+          -Dfusermount_wrapper=true
+          -Dwith_tcmalloc=true
+          -Denable_tracing=true
+          -Dwith_help=true
+          -Dwith_channel=flatpak-nightly
+          -Dwith_deviced=true
 
     script:
         - flatpak-builder --stop-at=${FLATPAK_MODULE} app ${MANIFEST_PATH}