Change on review suggestion

Author: BaoCaiH

diff-advance/README.md

@@ -13,18 +13,19 @@ Run `source setup.sh` or `bash setup.sh` or `./setup.sh` (or `.\setup.ps1` in Po
 3. Compare `git diff master pipeline-improvement` and `git diff pipeline-improvement master`. Notice what is being removed and added.
 4. Include `--word-diff` with `git diff`. In addition to the default, word diff can also be used in different modes, i.e. `--word-diff=color`. See how it is different from normal diff.
 5. Include `--name-only` option with `git diff` and see the result.
-6. With `--name-only`, we get a list of changed files. This can be useful for example when we want to do selective compile/test of changed files instead of a full re-build, given that steps can be compiled/tested independently. In our exercise, there are 3 steps in a pipeline and a utilities file. Let's say we only want to test the pipelines because we're confident enough with the utils to not test them (naughty-list programmer). We can do something like this:
+6. With `--name-only`, we get a list of changed files. This can be useful for example when we want to do selective compile/test of changed files instead of a full re-build, given that steps can be compiled/tested independently. In our exercise, there are 3 steps in a pipeline and an utilities file. Let's say we only want to test the pipelines because we're confident enough with the utils to not test them (naughty-list programmer). We can do something like this:
 
-    `git diff --name-only | grep .pipeline | xargs cat`
+    `git diff --name-only | grep '.pipeline' | xargs cat`
 
     This will:
     1. Get a list of the changed files
     2. Filter for only `.pipeline` files
-    3. `cat`/test only these files
+    3. `cat`/test these files
 
 ## Relevant commands and options
+
 - `git diff`
 - `--word-diff`
 - `--name-only`
 - `grep`
-- `xargs`
+- `xargs`