rename c -> _ in iterations loop

Shame on me!
This throw away variable should never have had this confusing name!
c is used to iterate along the "sentence" right there in the internal loop

2019/sketch_191029a/sketch_191029a.pyde

@@ -19,7 +19,7 @@ def setup():
 
 def generate(n):
     global stroke_len, sentence
-    for c in range(n):
+    for _ in range(n):
         stroke_len *= 0.5
         nextSentence = ""
         for c in sentence:

2019/sketch_191030a/sketch_191030a.pyde

@@ -21,7 +21,7 @@ def setup():
 
 def generate(n):
     global stroke_len, sentence
-    for c in range(n):
+    for _ in range(n):
         stroke_len *= 0.5
         nextSentence = ""
         for c in sentence:

2019/sketch_191031a/sketch_191031a.pyde

@@ -22,7 +22,7 @@ def setup():
 
 def generate(n):
     global stroke_len, sentence
-    for c in range(n):
+    for _ in range(n):
         stroke_len *= 0.5
         nextSentence = ""
         for c in sentence:

2019/sketch_191101a/sketch_191101a.pyde

@@ -22,7 +22,7 @@ def setup():
 
 def generate(n):
     global stroke_len, sentence
-    for c in range(n):
+    for _ in range(n):
         stroke_len *= 0.5
         nextSentence = ""
         for c in sentence:

2019/sketch_191102a/sketch_191102a.pyde

@@ -31,7 +31,7 @@ def draw():
 
 def generate(n):
     global stroke_len, sentence
-    for c in range(n):
+    for _ in range(n):
         stroke_len *= 0.5
         nextSentence = ""
         for c in sentence:

2019/sketch_191103a/sketch_191103a.pyde

@@ -36,7 +36,7 @@ def draw():
 
 def generate(n):
     global stroke_len, sentence
-    for c in range(n):
+    for _ in range(n):
         stroke_len *= 0.5
         nextSentence = ""
         for c in sentence:

2019/sketch_191104a/sketch_191104a.pyde

@@ -33,7 +33,7 @@ def draw():
 
 def generate(n):
     global stroke_len, sentence
-    for c in range(n):
+    for _ in range(n):
         stroke_len *= 0.5
         nextSentence = ""
         for c in sentence:

2019/sketch_191105a/sketch_191105a.pyde

@@ -34,7 +34,7 @@ def draw():
 
 def generate(n):
     global stroke_len, sentence
-    for c in range(n):
+    for _ in range(n):
         stroke_len *= 0.5
         nextSentence = ""
         for c in sentence:

2019/sketch_191106a/sketch_191106a.pyde

@@ -35,7 +35,7 @@ def draw():
 
 def generate(n):
     global stroke_len, sentence
-    for c in range(n):
+    for _ in range(n):
         stroke_len *= 0.5
         nextSentence = ""
         for c in sentence:

2019/sketch_191107a/sketch_191107a.pyde

@@ -35,7 +35,7 @@ def draw():
 
 def generate(n):
     global stroke_len, sentence
-    for c in range(n):
+    for _ in range(n):
         stroke_len *= 0.5
         nextSentence = ""
         for c in sentence: