Use during in favor of on in docstrings

This wording is a bit richer and provides more context with respect to
the `on_*?` methods.

README.md

@@ -95,10 +95,10 @@ Biz.within(Time.utc(2015, 3, 7), Time.utc(2015, 3, 14)).in_seconds
 # Determine if a time is in business hours
 Biz.in_hours?(Time.utc(2015, 1, 10, 9))
 
-# Determine if a time is on a break
+# Determine if a time is during a break
 Biz.on_break?(Time.utc(2016, 6, 3))
 
-# Determine if a time is on a holiday
+# Determine if a time is during a holiday
 Biz.on_holiday?(Time.utc(2014, 1, 1))
 ```
 

spec/calculation/active_spec.rb

@@ -11,23 +11,23 @@
 
   describe '#result' do
     context 'when the time is not contained by an interval' do
-      context 'and not on a break nor holiday' do
+      context 'and not during a break nor holiday' do
         let(:time) { Time.utc(2006, 1, 1, 6) }
 
         it 'returns false' do
           expect(calculation.result).to eq false
         end
       end
 
-      context 'and on a break' do
+      context 'and during a break' do
         let(:time) { Time.utc(2006, 1, 3, 6) }
 
         it 'returns false' do
           expect(calculation.result).to eq false
         end
       end
 
-      context 'and on a holiday' do
+      context 'and during a holiday' do
         let(:time) { Time.utc(2006, 1, 4, 6) }
 
         it 'returns false' do
@@ -37,23 +37,23 @@
     end
 
     context 'when the time is contained by an interval' do
-      context 'and not on a break nor holiday' do
+      context 'and not during a break nor holiday' do
         let(:time) { Time.utc(2006, 1, 2, 12) }
 
         it 'returns true' do
           expect(calculation.result).to eq true
         end
       end
 
-      context 'and on a break' do
+      context 'and during a break' do
         let(:time) { Time.utc(2006, 1, 3, 10) }
 
         it 'returns false' do
           expect(calculation.result).to eq false
         end
       end
 
-      context 'and on a holiday' do
+      context 'and during a holiday' do
         let(:time) { Time.utc(2006, 1, 4, 12) }
 
         it 'returns false' do

spec/calculation/on_break_spec.rb

@@ -31,7 +31,7 @@
       end
     end
 
-    context 'when the time is not on a break' do
+    context 'when the time is not during a break' do
       let(:time) { Time.utc(2006, 1, 5, 12) }
 
       it 'returns false' do

spec/calculation/on_holiday_spec.rb

@@ -28,7 +28,7 @@
       end
     end
 
-    context 'when the time is not on a holiday' do
+    context 'when the time is not during a holiday' do
       let(:time) { Time.utc(2006, 1, 5, 12) }
 
       it 'returns false' do

spec/core_ext/time_spec.rb

@@ -33,15 +33,15 @@
   end
 
   describe '#on_break?' do
-    context 'when the time is on a break' do
+    context 'when the time is during a break' do
       let(:time) { time_class.utc(2006, 1, 2, 11) }
 
       it 'returns true' do
         expect(time.on_break?).to eq true
       end
     end
 
-    context 'when the time is not on a break' do
+    context 'when the time is not during a break' do
       let(:time) { time_class.utc(2006, 1, 2, 13) }
 
       it 'returns false' do
@@ -51,15 +51,15 @@
   end
 
   describe '#on_holiday?' do
-    context 'when the time is on a holiday' do
+    context 'when the time is during a holiday' do
       let(:time) { time_class.utc(2006, 1, 1, 12) }
 
       it 'returns true' do
         expect(time.on_holiday?).to eq true
       end
     end
 
-    context 'when the time is not on a holiday' do
+    context 'when the time is not during a holiday' do
       let(:time) { time_class.utc(2006, 1, 2, 12) }
 
       it 'returns false' do

spec/periods/after_spec.rb

@@ -268,7 +268,7 @@
     end
   end
 
-  context 'when a period on a holiday is encountered' do
+  context 'when a period during a holiday is encountered' do
     let(:origin) { Time.utc(2006, 1, 14) }
 
     it 'does not include that period' do
@@ -285,7 +285,7 @@
     end
   end
 
-  context 'when multiple periods on holidays are encountered' do
+  context 'when multiple periods during holidays are encountered' do
     let(:origin) { Time.utc(2006, 1, 14) }
 
     it 'does not include any of those periods' do

spec/periods/before_spec.rb

@@ -268,7 +268,7 @@
     end
   end
 
-  context 'when a period on a holiday is encountered' do
+  context 'when a period during a holiday is encountered' do
     let(:origin) { Time.utc(2006, 1, 18) }
 
     it 'does not include that period' do
@@ -285,7 +285,7 @@
     end
   end
 
-  context 'when multiple periods on holidays are encountered' do
+  context 'when multiple periods during holidays are encountered' do
     let(:origin) { Time.utc(2006, 1, 20) }
 
     it 'does not include any of those periods' do

spec/schedule_spec.rb

@@ -131,15 +131,15 @@
   end
 
   describe '#on_break?' do
-    context 'when the time is on a break' do
+    context 'when the time is during a break' do
       let(:time) { Time.utc(2006, 1, 2, 11) }
 
       it 'returns true' do
         expect(schedule.on_break?(time)).to eq true
       end
     end
 
-    context 'when the time is not on a break' do
+    context 'when the time is not during a break' do
       let(:time) { Time.utc(2006, 1, 2, 13) }
 
       it 'returns false' do
@@ -149,15 +149,15 @@
   end
 
   describe '#on_holiday?' do
-    context 'when the time is on a holiday' do
+    context 'when the time is during a holiday' do
       let(:time) { Time.utc(2006, 12, 25, 12) }
 
       it 'returns true' do
         expect(schedule.on_holiday?(time)).to eq true
       end
     end
 
-    context 'when the time is not on a holiday' do
+    context 'when the time is not during a holiday' do
       let(:time) { Time.utc(2006, 12, 26, 12) }
 
       it 'returns false' do