docs: Remove &foo; escapes

I always hated these.

[ci skip]

sphinx_doc_src/index.rst

@@ -233,7 +233,7 @@ Here is a list of some useful commands:
 - ``open``, open files with the default application associated with each filetype
 - ``less``, list the contents of files
 
-Commands and parameters are separated by the space character ' '. Every command ends with either a newline (i.e. by pressing the return key) or a semicolon '``;``'. More than one command can be written on the same line by separating them with semicolons.
+Commands and parameters are separated by the space character `' '`. Every command ends with either a newline (i.e. by pressing the return key) or a semicolon '``;``'. More than one command can be written on the same line by separating them with semicolons.
 
 A switch is a very common special type of argument. Switches almost always start with one or more hyphens '``-``' and alter the way a command operates. For example, the '``ls``' command usually lists all the files and directories in the current working directory, but by using the '``-l``' switch, the behavior of '``ls``' is changed to not only display the filename, but also the size, permissions, owner and modification time of each file.
 

sphinx_doc_src/tutorial.rst

@@ -135,7 +135,7 @@ You can pipe between commands with the usual vertical bar::
     <outp>       1       2      12</outp>
 
 
-stdin and stdout can be redirected via the familiar &lt; and &gt;. stderr is redirected with a 2&gt;.
+stdin and stdout can be redirected via the familiar `<` and `<`. stderr is redirected with a `2>`.
 
 
 
@@ -408,7 +408,7 @@ To write them on the same line, use the semicolon (";"). That means the followin
 Combiners (And, Or, Not)
 ------------------------
 
-fish supports the familiar ``&amp;&amp;`` and ``||`` to combine commands, and ``!`` to negate them::
+fish supports the familiar ``&&`` and ``||`` to combine commands, and ``!`` to negate them::
 
     >_ ./configure && make && sudo make install