docs: Improve formatting and clarity in developmental releases section

Author: tony

docs/quickstart.md

@@ -21,18 +21,18 @@ $ pip install --user --upgrade libvcs
 ### Developmental releases
 
 New versions of libvcs are published to PyPI as alpha, beta, or release candidates. In their
-versions you will see notification like `a1`, `b1`, and `rc1`, respectively. `1.10.0b4` would mean
+versions, you will see notations like `a1`, `b1`, and `rc1`, respectively. For example, `1.10.0b4` would mean
 the 4th beta release of `1.10.0` before general availability.
 
-- [pip]\:
+Installation options:
+
+- Via pip (pre-release versions):
 
   ```console
   $ pip install --user --upgrade --pre libvcs
   ```
 
-via trunk (can break easily):
-
-- [pip]\:
+- Via trunk (development version, may be unstable):
 
   ```console
   $ pip install --user -e git+https://github.com/vcs-python/libvcs.git#egg=libvcs