fix layout

ROScheatsheet.tex

@@ -202,7 +202,6 @@ \subsection{\href{http://wiki.ros.org/roslaunch}{roslaunch}}
 
 \section{Introspection and Command Tools}
 
-\vspace{-1mm}
 \subsection{\href{http://wiki.ros.org/rosnode}{rosnode}}
 \vspace{-1 mm}
 Displays debugging information about ROS nodes, including publications, subscriptions and connections.\\
@@ -234,7 +233,6 @@ \subsection{\href{http://wiki.ros.org/rosnode}{rosnode}}
 \end{nstabbing}
 \end{minipage}
 
-\vspace{-1 mm}
 \subsection{\href{http://wiki.ros.org/rostopic}{rostopic}}
 \vspace{-1 mm}
 A tool for displaying information about ROS \href{http://wiki.ros.org/Topics}{topics}, including publishers, subscribers, publishing rate, and messages.\\
@@ -250,7 +248,7 @@ \subsection{\href{http://wiki.ros.org/rostopic}{rostopic}}
 \texttt{rostopic pub}    & Publish data to topic. \\
 \texttt{rostopic type}   & Print topic type. \\
 \end{tabular}
-\vspace{-2 mm}
+\vspace{-1 mm}
 \begin{nstabbing}
 E\=x\=amples:\\
 \> Publish hello at 10 Hz:\\
@@ -263,7 +261,6 @@ \subsection{\href{http://wiki.ros.org/rostopic}{rostopic}}
 \> \>\texttt{\$ rostopic type /topic\_name | rosmsg show}
 \end{nstabbing}
 
-\vspace{-1 mm}
 \subsection{\href{http://wiki.ros.org/rosservice}{rosservice}}
 \vspace{-1 mm}
 A tool for listing and querying ROS services.\\
@@ -278,7 +275,7 @@ \subsection{\href{http://wiki.ros.org/rosservice}{rosservice}}
 \texttt{rosservice uri}   & Print the service ROSRPC uri. \\
 \texttt{rosservice find}  & Find services by service type.
 \end{tabular}
-\vspace{-2 mm}
+\vspace{-1 mm}
 \begin{nstabbing}
 E\=x\=amples:\\
 \> Call a service from the command-line:\\
@@ -289,7 +286,7 @@ \subsection{\href{http://wiki.ros.org/rosservice}{rosservice}}
 \> \>\texttt{\$ rosservice find rospy\_tutorials/AddTwoInts}\\
 \end{nstabbing}
 
-\vspace{-2 mm}
+\vspace{-4 mm}
 \subsection{\href{http://wiki.ros.org/rosnode}{rosconsole}}
 \vspace{-1 mm}
 Tool for configuring the logger level of ROS nodes.\\