Add newlines to help text for dfflegalize

I think these were probably missed by accident. Spotted because GCC
spits out lots of messages like this:

passes/techmap/dfflegalize.cc:114:7: warning: zero-length gnu_printf format string [-Wformat-zero-length]
  114 |   log("");
      |       ^~

(because we tell GCC that the first argument to log() looks like a
printf control string in log.h, and a zero length such string triggers
a warning).

1 files changed, 11 insertions, 11 deletions

diff --git a/passes/techmap/dfflegalize.cc b/passes/techmap/dfflegalize.cc
index 013f2d974..7f2cdc6ac 100644
--- a/passes/techmap/dfflegalize.cc
+++ b/passes/techmap/dfflegalize.cc
@@ -111,31 +111,31 @@ struct DffLegalizePass : public Pass {
 		log("- $_DLATCHSR_[NP][NP][NP]_\n");
 		log("\n");
 		log("The following transformations are performed by this pass:");
-		log("");
+		log("\n");
 		log("- upconversion from a less capable cell to a more capable cell, if the less");
 		log("  capable cell is not supported (eg. dff -> dffe, or adff -> dffsr)");
-		log("");
+		log("\n");
 		log("- unmapping FFs with clock enable (due to unsupported cell type or -mince)");
-		log("");
+		log("\n");
 		log("- unmapping FFs with sync reset (due to unsupported cell type or -minsrst)");
-		log("");
+		log("\n");
 		log("- adding inverters on the control pins (due to unsupported polarity)");
-		log("");
+		log("\n");
 		log("- adding inverters on the D and Q pins and inverting the init/reset values\n");
 		log("  (due to unsupported init or reset value)");
-		log("");
+		log("\n");
 		log("- converting sr into adlatch (by tying D to 1 and using E as set input)");
-		log("");
+		log("\n");
 		log("- emulating unsupported dffsr cell by adff + adff + sr + mux");
-		log("");
+		log("\n");
 		log("- emulating unsupported dlatchsr cell by adlatch + adlatch + sr + mux");
-		log("");
+		log("\n");
 		log("- emulating adff when the (reset, init) value combination is unsupported by\n");
 		log("  dff + adff + dlatch + mux");
-		log("");
+		log("\n");
 		log("- emulating adlatch when the (reset, init) value combination is unsupported by\n");
 		log("- dlatch + adlatch + dlatch + mux");
-		log("");
+		log("\n");
 		log("If the pass is unable to realize a given cell type (eg. adff when only plain dff");
 		log("is available), an error is raised.");
 	}