Merge pull request #11421 from lurch/patch-1

Fix typos

docs/development/build-instructions-linux.md

@@ -208,8 +208,8 @@ $ ./script/build.py -c R
 
 ### Environment variables
 
-Apart from `CC` and `CXX`, you can also set following environment variables to
-custom the building configurations:
+Apart from `CC` and `CXX`, you can also set the following environment variables to
+customise the build configuration:
 
 * `CPPFLAGS`
 * `CPPFLAGS_host`
@@ -226,4 +226,4 @@ custom the building configurations:
 * `LDFLAGS`
 
 The environment variables have to be set when executing the `bootstrap.py`
-script, it won't work in the `build.py` script.
+script, it won't work in the `build.py` script.