Spelling fixes

driver/iverilog.man.in

@@ -30,7 +30,7 @@ different set of programs. The path given is used to locate
 \fIivlpp\fP, \fIivl\fP, code generators and the VPI modules.
 .TP 8
 .B -c\fIfile\fP -f\fIfile\fP
-These flags specifies an input file that contains a list of Verilog
+These flags specify an input file that contains a list of Verilog
 source files. This is similar to the \fIcommand file\fP of other
 Verilog simulators, in that it is a file that contains the file names
 instead of taking them on the command line. See \fBCommand Files\fP below.

elab_scope.cc

@@ -793,7 +793,7 @@ void elaborate_rootscope_tasks(Design*des)
 	    }
 
 	    cerr << cur->second->get_fileline() << ": internal error: "
-		 << "elabortae_rootscope_tasks does not understand "
+		 << "elaborate_rootscope_tasks does not understand "
 		 << "this object," << endl;
 	    des->errors += 1;
       }

vhdlpp/expression_elaborate.cc

@@ -874,7 +874,7 @@ const VType* ExpName::probe_prefix_type_(Entity*ent, ScopeBase*scope) const
 }
 
 /*
- * This method is the probe_type() imlementation for ExpName objects
+ * This method is the probe_type() implementation for ExpName objects
  * that have prefix parts. In this case we try to get the type of the
  * prefix and interpret the name in that context.
  */

vhdlpp/main.cc

@@ -38,7 +38,7 @@ const char COPYRIGHT[] =
  *        information to the file named <path>.
  *
  *     elaboration=<path>
- *        Enable debugging of elaboratin by dumping elaboration
+ *        Enable debugging of elaboration by dumping elaboration
  *        process information to the file named <path>.
  *
  *     entities=<path>

vhdlpp/scope.h

@@ -169,7 +169,7 @@ class ActiveScope : public ScopeBase {
       bool is_vector_name(perm_string name) const;
 
 	// Locate the subprogram by name. The subprogram body uses
-	// this to locate the sobprogram declaration. Note that the
+	// this to locate the subprogram declaration. Note that the
 	// subprogram may be in a package header.
       SubprogramHeader* recall_subprogram(perm_string name) const;
 

vpi/vhdl_table.c

@@ -156,7 +156,7 @@ static PLI_INT32 ivlh_attribute_event_calltf(ICARUS_VPI_CONST PLI_BYTE8*data)
 
 	    rval.value.scalar = vpi1;
 
-	    // Detect if change occured in this moment
+	    // Detect if change occurred in this moment
 	    if (mon->last_event.high != tnow.high)
 		  rval.value.scalar = vpi0;
 	    if (mon->last_event.low != tnow.low)

vvp/dff.h

@@ -33,7 +33,7 @@
  *   port-2:  Clock Enable input
  *   port-3:  Asynchronous Set/Clear input.
  *
- * The base vvp_dff does not implement an asychronous set/clear.
+ * The base vvp_dff does not implement an asynchronous set/clear.
  */
 class vvp_dff : public vvp_net_fun_t {