Fix typographical and grammatical errors and inconsistencies.

The initial list of hits was generated with the codespell command
below, and each hit was evaluated and fixed manually while taking
context into consideration.

    DIRS="kernel/ frontends/ backends/ passes/ techlibs/"
    DIRS="${DIRS} libs/ezsat/ libs/subcircuit"
    codespell $DIRS -S *.o -L upto,iff,thru,synopsys,uint

More hits were found by looking through comments and strings manually.

6 files changed, 10 insertions, 10 deletions

diff --git a/passes/cmds/chformal.cc b/passes/cmds/chformal.cc
index 522758eae..7e32da65f 100644
--- a/passes/cmds/chformal.cc
+++ b/passes/cmds/chformal.cc
@@ -32,7 +32,7 @@ struct ChformalPass : public Pass {
 		log("    chformal [types] [mode] [options] [selection]\n");
 		log("\n");
 		log("Make changes to the formal constraints of the design. The [types] options\n");
-		log("the type of constraint to operate on. If none of the folling options is given,\n");
+		log("the type of constraint to operate on. If none of the following options are given,\n");
 		log("the command will operate on all constraint types:\n");
 		log("\n");
 		log("    -assert       $assert cells, representing assert(...) constraints\n");
@@ -59,7 +59,7 @@ struct ChformalPass : public Pass {
 		log("    -assume2assert\n");
 		log("    -live2fair\n");
 		log("    -fair2live\n");
-		log("        change the roles of cells as indicated. this options can be combined\n");
+		log("        change the roles of cells as indicated. these options can be combined\n");
 		log("\n");
 	}
 	void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
diff --git a/passes/cmds/connect.cc b/passes/cmds/connect.cc
index d480b79ac..f93bada27 100644
--- a/passes/cmds/connect.cc
+++ b/passes/cmds/connect.cc
@@ -137,7 +137,7 @@ struct ConnectPass : public Pass {
 		if (!set_lhs.empty())
 		{
 			if (!unset_expr.empty() || !port_cell.empty())
-				log_cmd_error("Cant use -set together with -unset and/or -port.\n");
+				log_cmd_error("Can't use -set together with -unset and/or -port.\n");
 
 			RTLIL::SigSpec sig_lhs, sig_rhs;
 			if (!RTLIL::SigSpec::parse_sel(sig_lhs, design, module, set_lhs))
@@ -157,7 +157,7 @@ struct ConnectPass : public Pass {
 		if (!unset_expr.empty())
 		{
 			if (!port_cell.empty() || flag_nounset)
-				log_cmd_error("Cant use -unset together with -port and/or -nounset.\n");
+				log_cmd_error("Can't use -unset together with -port and/or -nounset.\n");
 
 			RTLIL::SigSpec sig;
 			if (!RTLIL::SigSpec::parse_sel(sig, design, module, unset_expr))
@@ -170,7 +170,7 @@ struct ConnectPass : public Pass {
 		if (!port_cell.empty())
 		{
 			if (flag_nounset)
-				log_cmd_error("Cant use -port together with -nounset.\n");
+				log_cmd_error("Can't use -port together with -nounset.\n");
 
 			if (module->cells_.count(RTLIL::escape_id(port_cell)) == 0)
 				log_cmd_error("Can't find cell %s.\n", port_cell.c_str());
diff --git a/passes/cmds/select.cc b/passes/cmds/select.cc
index ba407ea8c..b5e8ef1af 100644
--- a/passes/cmds/select.cc
+++ b/passes/cmds/select.cc
@@ -987,7 +987,7 @@ struct SelectPass : public Pass {
 		log("list of selected objects.\n");
 		log("\n");
 		log("Note that many commands support an optional [selection] argument that can be\n");
-		log("used to YS_OVERRIDE the global selection for the command. The syntax of this\n");
+		log("used to override the global selection for the command. The syntax of this\n");
 		log("optional argument is identical to the syntax of the <selection> argument\n");
 		log("described here.\n");
 		log("\n");
diff --git a/passes/cmds/setundef.cc b/passes/cmds/setundef.cc
index a1dfa9b5c..56ef2d125 100644
--- a/passes/cmds/setundef.cc
+++ b/passes/cmds/setundef.cc
@@ -137,7 +137,7 @@ struct SetundefPass : public Pass {
 		log("        replace with $anyconst drivers (for formal)\n");
 		log("\n");
 		log("    -random <seed>\n");
-		log("        replace with random bits using the specified integer als seed\n");
+		log("        replace with random bits using the specified integer as seed\n");
 		log("        value for the random number generator.\n");
 		log("\n");
 		log("    -init\n");
diff --git a/passes/cmds/show.cc b/passes/cmds/show.cc
index a48873244..58acd302d 100644
--- a/passes/cmds/show.cc
+++ b/passes/cmds/show.cc
@@ -623,7 +623,7 @@ struct ShowPass : public Pass {
 		log("        assigned to each unique value of this attribute.\n");
 		log("\n");
 		log("    -width\n");
-		log("        annotate busses with a label indicating the width of the bus.\n");
+		log("        annotate buses with a label indicating the width of the bus.\n");
 		log("\n");
 		log("    -signed\n");
 		log("        mark ports (A, B) that are declared as signed (using the [AB]_SIGNED\n");
diff --git a/passes/cmds/tee.cc b/passes/cmds/tee.cc
index ff80f3859..ee96ace86 100644
--- a/passes/cmds/tee.cc
+++ b/passes/cmds/tee.cc
@@ -37,7 +37,7 @@ struct TeePass : public Pass {
 		log("specified logfile(s).\n");
 		log("\n");
 		log("    -q\n");
-		log("        Do not print output to the normal destination (console and/or log file)\n");
+		log("        Do not print output to the normal destination (console and/or log file).\n");
 		log("\n");
 		log("    -o logfile\n");
 		log("        Write output to this file, truncate if exists.\n");
@@ -46,7 +46,7 @@ struct TeePass : public Pass {
 		log("        Write output to this file, append if exists.\n");
 		log("\n");
 		log("    +INT, -INT\n");
-		log("        Add/subract INT from the -v setting for this command.\n");
+		log("        Add/subtract INT from the -v setting for this command.\n");
 		log("\n");
 	}
 	void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE