doc: whitespace cleanup

In most part, our .rst documents are indented with 8 spaces instead
of tabs. Bring the rest of the lines to the same format.
Also, on one (supposedly empty) line, trailing spaces were removed.

doc/man1/notmuch-address.rst

@@ -64,11 +64,11 @@ Supported options for **address** include
             messages. This is not applicable with --output=count.
 
         **mailbox**
-	    Deduplicate addresses based on the full, case sensitive
+            Deduplicate addresses based on the full, case sensitive
-	    name and email address, or mailbox. This is effectively
+            name and email address, or mailbox. This is effectively
-	    the same as piping the --deduplicate=no output to **sort |
+            the same as piping the --deduplicate=no output to **sort |
-	    uniq**, except for the order of results. This is the
+            uniq**, except for the order of results. This is the
-	    default.
+            default.
 
         **address**
             Deduplicate addresses based on the case insensitive

doc/man1/notmuch-config.rst

@@ -129,14 +129,14 @@ The available configuration items are described below.
 
         Name (or full path) of gpg binary to use in verification and
         decryption of PGP/MIME messages.
-    
+
         Default: ``gpg``.
 
     **built_with.<name>**
 
-	Compile time feature <name>. Current possibilities include
+        Compile time feature <name>. Current possibilities include
-	"compact" (see **notmuch-compact(1)**)
+        "compact" (see **notmuch-compact(1)**)
-	and "field_processor" (see **notmuch-search-terms(7)**).
+        and "field_processor" (see **notmuch-search-terms(7)**).
 
     **query.<name>**
 

doc/man1/notmuch-count.rst

@@ -48,9 +48,9 @@ Supported options for **count** include
         compatible with specifying search terms on the command line.
 
     ``--lastmod``
-	Append lastmod (counter for number of database updates) and UUID
+        Append lastmod (counter for number of database updates) and UUID
-	to the output. lastmod values are only comparable between databases
+        to the output. lastmod values are only comparable between databases
-	with the same UUID.
+        with the same UUID.
 
     ``--input=``\ <filename>
         Read input from given file, instead of from stdin. Implies

doc/man1/notmuch-dump.rst

@@ -77,21 +77,21 @@ Supported options for **dump** include
 
       **config**
 
-	Output configuration data stored in the database. Each line
+        Output configuration data stored in the database. Each line
-	starts with "#@ ", followed by a space separated key-value
+        starts with "#@ ", followed by a space separated key-value
-	pair.  Both key and value are hex encoded if needed.
+        pair.  Both key and value are hex encoded if needed.
 
       **properties**
 
-	Output per-message (key,value) metadata.  Each line starts
+        Output per-message (key,value) metadata.  Each line starts
-	with "#= ", followed by a message id, and a space separated
+        with "#= ", followed by a message id, and a space separated
-	list of key=value pairs.  pair.  Ids, keys and values are hex
+        list of key=value pairs.  pair.  Ids, keys and values are hex
-	encoded if needed.
+        encoded if needed.
 
       **tags**
 
-	Output per-message boolean metadata, namely tags. See *format* above
+        Output per-message boolean metadata, namely tags. See *format* above
-	for description of the output.
+        for description of the output.
 
       The default is to include all available types of data.  The
       option can be specified multiple times to select some subset. As

doc/man1/notmuch-restore.rst

@@ -54,23 +54,23 @@ Supported options for **restore** include
 
       Control what kind of metadata is restored.
 
-	**config**
+        **config**
 
-	  Restore configuration data to the database. Each configuration line starts
+          Restore configuration data to the database. Each configuration line starts
-	  with "#@ ", followed by a space separated key-value pair.
+          with "#@ ", followed by a space separated key-value pair.
-	  Both key and value are hex encoded if needed.
+          Both key and value are hex encoded if needed.
 
-	**properties**
+        **properties**
 
-	  Output per-message (key,value) metadata.  Each line starts
+          Output per-message (key,value) metadata.  Each line starts
-	  with "#= ", followed by a message id, and a space separated
+          with "#= ", followed by a message id, and a space separated
-	  list of key=value pairs.  pair.  Ids, keys and values are
+          list of key=value pairs.  pair.  Ids, keys and values are
-	  hex encoded if needed.
+          hex encoded if needed.
 
-	**tags**
+        **tags**
 
-	  Output per-message metadata, namely tags. See *format* above
+          Output per-message metadata, namely tags. See *format* above
-	  for more details.
+          for more details.
 
       The default is to restore all available types of data.  The
       option can be specified multiple times to select some subset.