doc: Fix copy-and-paste mistakes

Author: petere

doc/src/sgml/ref/create_aggregate.sgml

@@ -59,13 +59,13 @@ CREATE AGGREGATE <replaceable class="PARAMETER">name</replaceable> (
     [ , FINALFUNC = <replaceable class="PARAMETER">ffunc</replaceable> ]
     [ , FINALFUNC_EXTRA ]
     [ , INITCOND = <replaceable class="PARAMETER">initial_condition</replaceable> ]
-    [ , MSFUNC = <replaceable class="PARAMETER">sfunc</replaceable> ]
-    [ , MINVFUNC = <replaceable class="PARAMETER">invfunc</replaceable> ]
-    [ , MSTYPE = <replaceable class="PARAMETER">state_data_type</replaceable> ]
-    [ , MSSPACE = <replaceable class="PARAMETER">state_data_size</replaceable> ]
-    [ , MFINALFUNC = <replaceable class="PARAMETER">ffunc</replaceable> ]
+    [ , MSFUNC = <replaceable class="PARAMETER">msfunc</replaceable> ]
+    [ , MINVFUNC = <replaceable class="PARAMETER">minvfunc</replaceable> ]
+    [ , MSTYPE = <replaceable class="PARAMETER">mstate_data_type</replaceable> ]
+    [ , MSSPACE = <replaceable class="PARAMETER">mstate_data_size</replaceable> ]
+    [ , MFINALFUNC = <replaceable class="PARAMETER">mffunc</replaceable> ]
     [ , MFINALFUNC_EXTRA ]
-    [ , MINITCOND = <replaceable class="PARAMETER">initial_condition</replaceable> ]
+    [ , MINITCOND = <replaceable class="PARAMETER">minitial_condition</replaceable> ]
     [ , SORTOP = <replaceable class="PARAMETER">sort_operator</replaceable> ]
 )
 </synopsis>