More edits of installation guide

Author: kwankyu

src/doc/en/installation/binary.rst

@@ -1,6 +1,6 @@
 .. _sec-installation-from-binaries:
 
-Install from Pre-built Binaries
+Install from Pre-Built Binaries
 ===============================
 
 Linux

src/doc/en/installation/index.rst

@@ -128,7 +128,7 @@ In the cloud
 ============
 
 - `Sage Binder repo <https://github.com/sagemath/sage-binder-env>`_ provides a
-  Binder badge to launch JupyterLab computing environment with Sage.
+  Binder badge to launch JupyterLab environment with Sage.
 
 - `Sage Cell Server <https://sagecell.sagemath.org/>`_ is a free online service for
   quick computations with Sage.
@@ -140,7 +140,6 @@ In the cloud
   <https://hub.docker.com/r/sagemathinc/cocalc>`_ can be used on any system with Docker to run CoCalc locally.
 
 
-
 More information:
 
 .. toctree::

src/doc/en/installation/linux.rst

@@ -1,6 +1,6 @@
 .. _sec-GNU-Linux:
 
-Linux package managers
+Linux Package Managers
 ======================
 
 SageMath is available from various distributions and can be installed