Merge pull request pgf-tikz#1110 from jkugelman/manual-typo

fix(docs): unswap x/y coordinates in description

doc/generic/pgf/pgfmanual-en-tutorial.tex

@@ -168,9 +168,9 @@ \subsubsection{Setting up the Environment in \LaTeX}
 
 Inside the environment there are two |\draw| commands. They mean: ``The path,
 which is specified following the command up to the semicolon, should be
-drawn.'' The first path is specified as |(-1.5,0) -- (0,1.5)|, which means ``a
+drawn.'' The first path is specified as |(-1.5,0) -- (1.5,0)|, which means ``a
 straight line from the point at position $(-1.5,0)$ to the point at position
-$(0,1.5)$''. Here, the positions are specified within a special coordinate
+$(1.5,0)$''. Here, the positions are specified within a special coordinate
 system in which, initially, one unit is 1cm.
 
 Karl is quite pleased to note that the environment automatically reserves