improved readme

Author: csoltenborn

GoogleTestAdapter/VsPackage.GTA/Resources/ReleaseNotes/0.18.0.md

@@ -1,4 +1,4 @@
-* enhancement: the new option *Environment variables* allows to modify the environment variables seen by the test executables without modifying the system's global environment. Variables are provided by means of key-value pairs 'Foo=Bar', and are separated by '//||//' ([#302](https://github.com/csoltenborn/GoogleTestAdapter/issues/302))
+* enhancement: the new option *Environment variables* allows to modify the environment variables seen by the test executables without modifying the system's global environment. Variables are provided by means of key-value pairs `Foo=Bar`, and are separated by `//||//` ([#302](https://github.com/csoltenborn/GoogleTestAdapter/issues/302))
 * enhancement: added some debug output to make working with settings helper files easier ([#278](https://github.com/csoltenborn/GoogleTestAdapter/issues/278))
 * bugfix: if the last variable's value of a settings helper file was followed by a line break, that line break would be added to the value ([#306](https://github.com/csoltenborn/GoogleTestAdapter/issues/306))
 * maintenance: fixed some deprecation warnings in NuGet specification ([#264](https://github.com/csoltenborn/GoogleTestAdapter/issues/264))