fix markdown linting issues + minor enhancements to info on EasyBuild…

… v5.0.0beta1 release

docs/easybuild-v5/release-candidates.md

@@ -13,19 +13,27 @@ we will tag a couple of beta releases and release candidates before releasing Ea
 
     It can be used for testing and providing feedback (reporting bugs or unexpected behaviour, etc.).
 
-    Additional changes will be made for the release of EasyBuild v5.0.0 however, [see below][beta1_planned_changes].
+    Additional changes can still be made before the release of EasyBuild v5.0.0, [see below][beta1_planned_changes].
 
 ### Highlighted changes
 
-EasyBuild v5.0.0 will include some significant changes compared to EasyBuild v4.x that you should be aware of, including:
+EasyBuild v5.0.0 will include some significant changes compared to EasyBuild v4.x.
+
+Some of those changes are internal improvements and will be invisible to most users, but many others may need special attention
+as they incorporate new features, changes of behavior or deprecations that can impact your workflow.
+
+This includes (but is not limited to):
 
 - **Python >= 3.6** is required to run EasyBuild (Python >= 3.9 is recommended);
 - using **Lmod >= v8.0** or **Environment Modules v4.3.0** is required as modules tool (check with `module --version`);
 - a new function named `run_shell_cmd` is used to run shell commands like `cmake`, `make`, `pip`, etc. (more info [here](run_shell_cmd.md));
 - the **default settting of some configuration options has changed**:
     - **RPATH linking** is used by default (can be disabled with `--disable-rpath`);
     - **trace output** is enabled by default (can be disabled with `--disable-trace`);
-    - Lua module files generated by EasyBuild will use `depends_on` rather than `load` by default (can be disabled with `--disable-module-depends-on`);
+    - Lua module files generated by EasyBuild will by default:
+        - use `depends_on` rather than `load` (can be disabled with `--disable-module-depends-on`);
+        - include an `extensions` statement to expose the list of included extensions (can be disabled with `--disable-module-extensions`);
+    - reproducible creation of source tarballs from Git repositories via `git_config` in `sources` easyconfig parameter (when using Python >= 3.9);
     - the `use_pip` and `sanity_pip_check` custom easyconfig parameters used by the `PythonPackage` and `PythonBundle` easyblocks are enabled by default;
 - **some functionality has been deprecated**, including the use of the `run_cmd` and `run_cmd_qa` functions (`run_shell_cmd` should be used instead);
 - easyconfigs using an old [unsupported toolchain](../policies/toolchains.md) have been moved to the [easyconfigs archive](https://github.com/easybuilders/easybuild-easyconfigs-archive);
@@ -34,8 +42,9 @@ EasyBuild v5.0.0 will include some significant changes compared to EasyBuild v4.
 
 To install the initial beta release of EasyBuild v5.0.0 (`5.0.0beta1`), you can either:
 
-* use the [provided easyconfig file](https://github.com/easybuilders/easybuild-easyconfigs/pull/22049);
-* install into a Python virtual environment:
+- use the [provided easyconfig file](https://github.com/easybuilders/easybuild-easyconfigs/pull/22049);
+- install into a Python virtual environment:
+
   ```shell
   venv_name='venv-eb-5.0.0beta1'
   python3 -m venv ${venv_name}