[PATCH v2] Consistent variable name make less confusion

[Cao jin]

When @node "call Function" is outputted in Info format, there are inconsistent
inconsistent variable names between example and description. @var is used to
indicate metasyntactic variables, and will change the case of the argument to
all uppercase in Info file. @code is more suitable in this case.

Signed-off-by: Cao jin <address@hidden>
---
 doc/make.texi | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/doc/make.texi b/doc/make.texi
index 343927b..57c8806 100644
--- a/doc/make.texi
+++ b/doc/make.texi
@@ -7655,7 +7655,7 @@ foo = $(call reverse,a,b)
 @end smallexample
 
 @noindent
-Here @var{foo} will contain @samp{b a}.
+Here @code{foo} will contain @samp{b a}.
 
 This one is slightly more interesting: it defines a macro to search for
 the first instance of a program in @code{PATH}:
@@ -7667,7 +7667,7 @@ LS := $(call pathsearch,ls)
 @end smallexample
 
 @noindent
-Now the variable LS contains @code{/bin/ls} or similar.
+Now the variable @code{LS} contains @code{/bin/ls} or similar.
 
 The @code{call} function can be nested.  Each recursive invocation gets
 its own local values for @code{$(1)}, etc.@: that mask the values of
@@ -7678,14 +7678,14 @@ higher-level @code{call}.  For example, here is an 
implementation of a
 map = $(foreach a,$(2),$(call $(1),$(a)))
 @end smallexample
 
-Now you can @var{map} a function that normally takes only one argument,
+Now you can @code{map} a function that normally takes only one argument,
 such as @code{origin}, to multiple values in one step:
 
 @smallexample
 o = $(call map,origin,o map MAKE)
 @end smallexample
 
-and end up with @var{o} containing something like @samp{file file default}.
+and end up with @code{o} containing something like @samp{file file default}.
 
 A final caution: be careful when adding whitespace to the arguments to
 @code{call}.  As with other functions, any whitespace contained in the
-- 
2.1.0