Some typo and formatting fixes in tips lecture

tips/tips.tex

@@ -86,7 +86,7 @@
   \bigskip
   \pause
 
-  Then, in you ``\bt{.bashrc}'' file, add ``\bt{\_\_git\_ps1}'' to the
+  Then, in your ``\bt{.bashrc}'' file, add ``\bt{\_\_git\_ps1}'' to the
   ``\bt{PS1}'' variable, and source your ``\bt{.bashrc}'' again.
   \bigskip
 \end{frame}
@@ -101,7 +101,7 @@
   \pause
 
   You can view who committed the line change, the commit hash,
-  and the commit time using ``\bt{git blame}''
+  and the commit time using ``\bt{git blame}''.
   \begin{lstlisting}[language=none, caption=git blame command]
     $ git blame README
     a4394d28 (bow 2014-06 ...) Second version.
@@ -119,7 +119,7 @@
   \bigskip
   \pause
 
-  Official releases, for example, are better referred as v1.0
+  Official releases, for example, are better referred to as v1.0
   than a76a0fx.
   \bigskip
   \pause
@@ -210,7 +210,7 @@
   \bigskip
   \pause
 
-  This can be done via ``\bt{git diff -w}''
+  This can be done via ``\bt{git diff -w}''.
   \begin{lstlisting}[language=none, caption=git diff without whitespace]
     $ git diff -w
   \end{lstlisting}
@@ -259,7 +259,7 @@
 
   You can also use the command to meld current staged changes to your last
   committed change.
-  \begin{lstlisting}[language=none, caption=git blame command]
+  \begin{lstlisting}[language=none, caption=git commit --amend]
     $ git status
     Changes to be committed:
         modified:   README
@@ -310,8 +310,10 @@
 \begin{frame}[fragile]
   \frametitle{Viewing}
 
-  In Linux, git uses the ``\bt{~/.gitconfig}'' file as its main
-  configuration file.
+  % http://tex.stackexchange.com/a/9372
+  In Linux, git uses the
+  ``\bt{{\raise.17ex\hbox{$\scriptstyle\mathtt{\sim}$}}/.gitconfig}'' file as
+  its main configuration file.
   \bigskip
   \pause
 
@@ -330,8 +332,9 @@
 \begin{frame}[fragile]
   \frametitle{Modifying}
 
-  To edit the file directly, open ``\bt{~/.gitconfig}'' in a text editor
-  and save your changes.
+  To edit the file directly, open
+  ``\bt{{\raise.17ex\hbox{$\scriptstyle\mathtt{\sim}$}}/.gitconfig}'' in a
+  text editor and save your changes.
   \begin{lstlisting}[language=none, caption=Modifying the config file]
     $ vim ~/.gitconfig
   \end{lstlisting}