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Found by Lintian, patches provided by C. Schoenert

ChangeLog

@@ -13794,7 +13794,7 @@ New include File:
 2010-10-09  Robert Larice
  * src/include/complex.h :
     !REVERT! remove typedef for _complex, which is used nowhere
-    this breaks MSVC, currently unkown why, FIXME
+    this breaks MSVC, currently unknown why, FIXME
 
 2010-10-09  Robert Larice
  * src/frontend/parse-bison.c ,

src/frontend/options.c

@@ -330,7 +330,7 @@ cp_usrset(struct variable *var, bool isset)
         ft_stricterror = isset;
         if (ft_ngdebug)
             fprintf(stdout, "Note: strict_errorhandling is set\n");
-        /* Immediately bail out when spinit error has occured */
+        /* Immediately bail out when spinit error has occurred */
         if (ft_spiniterror)
             controlled_exit(EXIT_BAD);
     } else if (eq(var->va_name, "rawfileprec")) {

src/include/ngspice/klu.h

@@ -133,7 +133,7 @@ typedef struct          /* 64-bit version (otherwise same as above) */
 #define KLU_EMPTY_MATRIX (2)        /* Modified by Francesco Lannutti - Case when the matrix is empty */
 #define KLU_OUT_OF_MEMORY (-2)
 #define KLU_INVALID (-3)
-#define KLU_TOO_LARGE (-4)          /* integer overflow has occured */
+#define KLU_TOO_LARGE (-4)          /* integer overflow has occurred */
 
 typedef struct klu_common_struct
 {

src/xspice/icm/analog/file_source/cfunc.mod

@@ -336,9 +336,9 @@ void cm_filesource(ARGS)   /* structure holding parms, inputs, outputs, etc.
         loc->timeinterval[1] = loc->indata->datavec[loc->indata->actpointer + stepsize];
 
         if (terr)
-            cm_message_printf("WARNING: some error occured during reading the time values");
+            cm_message_printf("WARNING: some error occurred during reading the time values");
         if (derr)
-            cm_message_printf("WARNING: some error occured during reading the data values");
+            cm_message_printf("WARNING: some error occurred during reading the data values");
     }
 
     loc = STATIC_VAR (locdata);